Voltage-controlled electron-hole interaction in a single quantum dot

Details Voltage-controlled electron-hole interaction in a single quantum dot Voltage-controlled electron-hole interaction in a single quantum dot

2004-10-27

arxiv.org/abs/cond-mat/0410687v2

Journal of Superconductivity 18 (2), 245-249 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Conference Proceedings, Physics and Applications of Spin-Related Phenomena in Semiconductors, Santa Barbara (CA), 2004. 4 page

Scientific paper

10.1007/s10948-005-3377-4

The ground state of neutral and negatively charged excitons confined to a single self-assembled InGaAs quantum dot is probed in a direct absorption experiment by high resolution laser spectroscopy. We show how the anisotropic electron-hole exchange interaction depends on the exciton charge and demonstrate how the interaction can be switched on and off with a small dc voltage. Furthermore, we report polarization sensitive analysis of the excitonic interband transition in a single quantum dot as a function of charge with and without magnetic field.

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